Transient Blood Flow in occluded vessel

Itsjoem · December 10, 2014, 12:51

Hi i am very new to CFD and am trying to implement transient blood flow, i have managed to do the two pressures separately (Systole and Diastole) and they seem to show ideal results. However i'm not sure how to then make these two pressures change over a certain time period.

Thanks for reading,
Joe

koray · December 17, 2014, 06:11

Hey there,

It's an interesting topic. Which solver do you use?
What you need is to define a variable boundary condition to simulate the continuous process. You can even take the vein motion into account by using mesh deformation/remeshing.

Please, ask for further help.

Cheers,
Koray

Radwanma · December 17, 2014, 07:25

Clearing partially read grid.
70608 nodes.
47870 quadrilateral wall faces, zone 12.
22812 quadrilateral wall faces, zone 13.

Building...
mesh
Primitive Error at Node 0:
Partition: cell count = 0; count must be greater than zero.

Primitive Error at Node 1:
Partition: cell count = 0; count must be greater than zero.

Error:
Partition: cell count = 0; count must be greater than zero.
Error Object: #f

Radwanma · December 17, 2014, 07:26

Dear All

I HAVE THIS PROBLEM IN MY 3d CYLINDER MESH

December 10, 2014, 12:51	Transient Blood Flow in occluded vessel	#1
Itsjoem New Member Joe Moore Join Date: Dec 2014 Posts: 1 Rep Power: 0	Hi i am very new to CFD and am trying to implement transient blood flow, i have managed to do the two pressures separately (Systole and Diastole) and they seem to show ideal results. However i'm not sure how to then make these two pressures change over a certain time period. Thanks for reading, Joe

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December 17, 2014, 06:11		#2
koray New Member Join Date: Nov 2012 Posts: 18 Rep Power: 14	Hey there, It's an interesting topic. Which solver do you use? What you need is to define a variable boundary condition to simulate the continuous process. You can even take the vein motion into account by using mesh deformation/remeshing. Please, ask for further help. Cheers, Koray

December 17, 2014, 07:25		#3
Radwanma Member Radwanma Join Date: Oct 2014 Posts: 30 Rep Power: 12	Clearing partially read grid. 70608 nodes. 47870 quadrilateral wall faces, zone 12. 22812 quadrilateral wall faces, zone 13. Building... mesh Primitive Error at Node 0: Partition: cell count = 0; count must be greater than zero. Primitive Error at Node 1: Partition: cell count = 0; count must be greater than zero. Error: Partition: cell count = 0; count must be greater than zero. Error Object: #f

December 17, 2014, 07:26		#4
Radwanma Member Radwanma Join Date: Oct 2014 Posts: 30 Rep Power: 12	Dear All I HAVE THIS PROBLEM IN MY 3d CYLINDER MESH